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Has anybody been working with patterns in C#. I would like some book recommondations?
/Ervar
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hi.
I don't know whether this book is good or not, but recently I came over it (the title) on the web.
"Introduction to Design Patterns in C#"
Copyright © 2002 by James W. Cooper
IBM T J Watson Research Center
February 1, 2002
greetings
andi
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Not that great. Definately not a "God" book.
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Thanks, I'll keep looking... 
/Ervar
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I have looked through the System.Drawing namespace in search for a method that takes a part of a bitmap. But I can't seem to find any.
Grateful for any help offered
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1) Create a new bitmap the size of the area you want to cut out
2) Make a Graphics for that bitmap
3) Use DrawImage to draw the image at the correct location
"Blessed are the peacemakers, for they shall be called sons of God." - Jesus
"You must be the change you wish to see in the world." - Mahatma Gandhi
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Actually I personally think it would be faster to use the close method and let the CLR amanage creating the new image for yoiu which would be inherently faster.
Although I'm a direct3D programmer so the speed would only be noticed by me.
nick
I'm not an expert yet, but I play one at work. Yeah and here too.
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oki, thx 
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hi !
does anybody know which of these two methods to synchronize an ArrayList is more efficient?
execute critical code in a lock block:
lock(myArrayList)
{
blabla
}
-or-
define the ArrayList as Syncronized:
myArrayList = ArrayList.Synchronized(unsyncrArrayList);
thanks.
andi
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Andi
There's no difference performance-wise. (Synchronized uses the lock keyword itself.) Sop it boils down to whether you need to specify the actual intent in your code. With
lock(MyArrayList) {
MyArrayList.This();
MyArrayList.That();
MyArrayList.TheOther();
}
you are explicitly stating that, yes, this is threadsafe. Look, there's the lock keyword. With
MyArrayList.This();
MyArrayList.That();
MyArrayList.TheOther();
you are saying, trust me, I've set up MyArrayList to be a Synchronized version of another ArrayList, so this is threadsafe. Maybe the code that sets up the Synchronized version is nearby, so it's obvious (say in a using block).
Of course, if you forget to set up MyArrayList in that way, you've got a bug.
Cheers, Julian
Program Manager, C#
This posting is provided "AS IS" with no warranties, and confers no rights.
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hi !
i have the following problem:
i have -lets say- 3 procedures, which should be called at a given probability:
60 % proc. A
30 % proc. B
10 % proc. C
how can i manage this?
my idea:
r = new Random();
if (r.NextDouble() < 0.6) -> A
if (r.NextDouble() >=0.6 and < 0.9) -> B
if (r.NextDouble() >=0.9 and < 1.0) -> C
in principle this works fine, BUT
is this efficient?
is it exact?
what about the pseudo-random-number-generator in c#?
do you have any suggestions ?!?!?!
THANK YOU !
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It does not work, it has a bug. They way you coded, there will be times where no procedure will be called because you are calling r.NextDouble several times. What you need is to store the number on a local variable, like this:
r = new Random();
double d = r.NextDouble();
if (d < 0.6) -- A
if (d >=0.6 and < 0.9) -- B
if (d >=0.9 and < 1.0) -- C
I hope that you have money because it’s necessary to be practical.
And I hope that at least once a year you put some money in front of you and say "you are mine" just to make clear who owns who. - Victor Hugo
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of course !!!!! 
thanks.
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You no with putting some web.config file including below lines:
<configuration>
<system.web>
<authorization>
<deny users="?" />
</authorization>
</system.web>
</configuration>
in some folder, access to that folder is only possible for authenticated users. but this happens only for *.aspx files.
How could we restrict access to for example *.zip files?
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This administrative part, not developer business , simply you have to do it from your windows.
Mazy
No sig. available now.
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hi,
in my app., i have a window form with several labels and groupboxes but no button. i can receive keypress event of that form in my event handler.
however, after added a button the window form, i can't receive KeyPress Event. after deleted it or added another label, it work again!
any help?
thanks,
jim
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hi !
you have to set the KeyPreview-Property of the form to true.
cu
andi
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you also have to
public override bool ProcessKeyPreview( Message msg) {return bProcessed;}
false = did not handle
true = did handle
I'm not an expert yet, but I play one at work. Yeah and here too.
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protected override bool ...
Hi,
AW
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Well your right but i dont see the point. I like javas rule much better on modifiying overriden methods.
nick
I'm not an expert yet, but I play one at work. Yeah and here too.
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Hi,
Is it possible to distribute C# class code in separate files as is possible with C++ classes?
The classes in my application are getting bigger and bigger and distributing different functionalities in separate files could help in managing the code.
Thanks,
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When this happens, it's best to divide the classes up into multiple classes. However, sometimes that's not possible. The current version of C# does not support this, but the next version will support it.
"Blessed are the peacemakers, for they shall be called sons of God." - Jesus
"You must be the change you wish to see in the world." - Mahatma Gandhi
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I am making a control, and in that I need to implement a caret. I do have problems with that simple task.
First I just want to be able to place the caret in the end of a custom text. I do like this:
float xpos = gfx.MeasureString(string, font).Width
g.FillRectangle(System.Drawing.Brushes.Black, xpos - 3, 0, 1, this.Font.Height);
There is a problem with this. If I use 333 as the text, it goes fine, but do I use 1111111191, the caret is being placed maybe 5 - 10 pixels from the last 1. It seems to me that the size of 1 is measured larger than it actually is.
What can I do about this problem? Am I attacking this problem from the wrong angle? Is there any implementation already made?
Gooky
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Add caret sign to the end of displayed string in paint method -or- add it to the string in setting Text property and remove it in getting this property.
Hi,
AW
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